The Maintenance Center, staffed by Valerie, is Vault City's workshop. Here, the high technology that provides the citizens with a high quality of life undergoes maintenance and is kept alive through the talents of Vic's daughter. Of course, as long as she has the right tools available, which isn't always the case.
The maintenance center is divided into two areas. The workshop is where Valerie stands and has little in the way of loot. The room in the back has multiple lockers which contain tools and spare parts, but no major items of value.
Maintenance Center appears only in Fallout 2.